package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import jdk.nashorn.internal.scripts.JS;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    UserMapper userMapper;
    @Autowired
    WeChatProperties weChatProperties;
    /**
     *用户登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //map集合传参
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        //HTTP请求openid
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        //转成java对象
        JSONObject jsonObject=JSON.parseObject(json);
        //获取对象里指定列的值
        String openid = jsonObject.getString("openid");
        //如果没有openid返回异常信息
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //根据openid查询用户
        User user=userMapper.getByOpenid(openid);
        //如果用户不存在,添加
        if(user == null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }
}
